Improvement in snow-plows



SNOW-PLOW. v

Patented Feb. 15, 1876.

:NyENTOR WITN E ssgs ATTORNEYS N.PETERS. F HER, WASHINGTON O G UNITEDSTATES PATENT OE rcE ALEXANDER GAMBLE AND DAVID E. SPERRY, or SAGKETTSHARBOR, N. Y.

IMPROVEMENT IN SNOW-FLOWS.

Specification forming part of Letters Patent No. 173,613, dated February15,1876 application filed June 12, 1875.

To all whom it may concern Be it known that we, ALEXANDER GAMBLE andDAVID E SPERRY, both of Sacketts Harbor, in the county of Jefferson andState of New York, have invented a new and valuable Improvement inSnow-Flows; and we do hereby declare that the following is a full,clear, andexact description of the construction and operation of thesame, reference being had to the annexed drawings, making a part of thisspecification, and to the letters and figures of reference markedthereon.

Figure 1 of the drawings is a representation of a perspective view ofour snow-plow, and Fig. 2 is a longitudinal vertical sectional -view ofthe same.

This invention has relation to improvements in railroad snow-plows,wherein two lateral colters and a double mold-board and shovel areemployed; and the nature of the invention consists in the constructionand arrangement of the parts, as will be hereinafter more fully setforth and claimed.

In the annexed drawings, A designates trucks, of the usual well-knownconstruction, upon which our improved snow-plow is designed to besupported in an inclined position.

' The platform, B, of the plow is supported by a suitable frame-work,and it is smoothly sheathed with metal, for the purpose of protecting itfrom the wearing effects of ice and snow passing upward over itssurface. Platform B is provided with mold-boards G 0, near its upperedge, which convergein an arc, which is preferably outwardly concaved,and which are provided with a vertical colter, D, the frontedge of whichextends downward to the front edge of shovel-platform B, as shown.

in Fig. 1. This platform is considerably wider at its upper than at itslower end-that is to say, its lateral edges or sides form obtuse angleswith the cutting-edge of the shovel and lateral colters F E, extendingupward the same distance as the colter D, are rigidly secured to thesaid lateral edges, as shown in Fig. 1. Lateral coulters E F are cutaway at a point slightly in rear of the cutting-edge of mold-boards U G,and they are covered in by a roof, G, which may be of wood or of metal,which roof is rigidly secured to the upper edges of lateral colters E F,central colter D, and mold-boards G O, as shown in Fig. 1. By this meanstwo conduits are formed,

'tuse an gles with one on each-side of the central colter D, the innerwalls of which diverge outwardly from each other, as shown in thedrawings.

When the snow-plow above described is forcibly driven into a bank ofsnow, the front cutting-edge of the said plow being of the same width asthe track, the snow will be confined by roof G until it reaches theconcave surfaces of mold-boards O 0, when it will be dashed upward andoutward from the track in two separate and distinct streams, which willfall at a distance from the track proportionate to the speed at whichthe engine is driven- By this means also the snow, in ascendingshovel-platform B, will be prevented from falling over the upper edgesof lateral colters E F upon the track, and thus the rail will beprevented frombecoming glazed with ice in consequence of a suddenlowering of temperature following a thaw. The inner rear edges of.platform B are raised considerably above the corresponding outer edgesthereof, so that it is made to describe a warped surface, the effect ofwhich is to impart a twist to the stream of snow passing out at the rearlateral edges of the plow, and to increase the distance from thedeposited beyond the trench cut therein.

What we claim as new, and desire to secure by Letters Patent, is-

In a snow-plow, the inclined shovel B, havin g the mold-boards (J O atits rear end, which diverge in arcs, with their concavities outward, incombination with the vertical colter D, extending from the junction ofthe moldboards to the front end of the inclined shovel, lateral coltersE F, extending upward at ohthe cutting-edge of the shovel, and providedwith openings at their rear ends opposite the mold-boards, and roof Gr,whereby the snow raised by the inclined shovel is divided and packed inequal sections and discharged from the openings in each side of thesnow-plow, substantially as described. k

In testimony that we claim the above, we have hereunto subscribed ournames in the presence of two witnesses.

ALEXANDER GAMBLE. DAVID E. SPERRY.

Witnesses:

JAMES I. PHELPs, R. GODFREY.

track at which it will be

